Dr. Seuss is back!

The first new book in 25 years by Dr. Seuss, aka Theodor Geisel, will debut July 28.“What Pet Should I Get?” features the spirited siblings from the beloved classic “One Fish Two Fish Red Fish Blue Fish” and is believed to have been written between 1958 and 1962.

“Ted loved and had pets himself, as a young boy on up through adulthood, and that makes the wonderful excitement and buzz for this new book all the more special,” said Susan Brandt, president, licensing and marketing of Dr. Seuss Enterprises.

Geisel’s widow, Audrey Geisel, found the manuscript and illustrations in their California home soon after her husband died in 1991. The materials were set aside and then rediscovered in 2013. Random House Children’s Books said in February that it expects to release additional books from the found materials.

It only seems to prove the siblings’ lesson from “One Fish Two Fish Red Fish Blue Fish.”